51838441642 has 8 divisors (see below), whose sum is σ = 83739021156. Its totient is φ = 23925434592.

The previous prime is 51838441639. The next prime is 51838441643. The reversal of 51838441642 is 24614483815.

51838441642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50341448161 + 1496993481 = 224369^2 + 38691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51838441592 and 51838441601.

It is not an unprimeable number, because it can be changed into a prime (51838441643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996893083 + ... + 996893134.

Almost surely, 2^51838441642 is an apocalyptic number.

51838441642 is a deficient number, since it is larger than the sum of its proper divisors (31900579514).

51838441642 is a wasteful number, since it uses less digits than its factorization.

51838441642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993786232.

The product of its digits is 737280, while the sum is 46.

The spelling of 51838441642 in words is "fifty-one billion, eight hundred thirty-eight million, four hundred forty-one thousand, six hundred forty-two".